Nordin, J. A., & Salera, V. (1950). Elementary economics. Prentice-Hall.
Dyfyniad Arddull ChicagoNordin, John A., and Virgil Salera. Elementary Economics. New York: Prentice-Hall, 1950.
Dyfyniad MLANordin, John A., and Virgil Salera. Elementary Economics. Prentice-Hall, 1950.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.